Energy,Cholesterol levels ie. skin tone, weight loss, mental alertness are all better after taking for several months(500mg/day). Unfortunately, it is difficult to attribute all these positive signs to the capsules as I have increased my physical activity(play Tennis 7hrs/wk in addition to weightlifting 2-3x/wk. Also eat lots of lowfat food, fish, high fiber, vegetable, fruits, Acai, etc. To take a similar resveratrol dose as in the Sinclair Experiments would need to take 2,000-4,000 mg/day for my 80kg. Feel good for a male 53yrs old. will continue to take resveratrol, maybe higher dose.

You don't find much about resveratrol's side effects, but they do exist.
If you have a sensitive digestive system as I do, this product will upset your system.
Although it doesn't state it on the label, the product appears to contain Japanese knotwood, the source of caffeine in products like this.
So between keeping me awake all night and upsetting my colon, it's not worth it to me to continuing taking. I'll eat peanuts and grape juice instead.

I have used other brands that are "top sellers" at iherb......this brand is by far a superior product. You can see when you open the bottle...the smell and color of the capsules are different than other brands. Seems to be much more potent than the others. Also comes in a 500mg capsule.

It's important to me to have organic grape skins since grapes are one of the most highly sprayed fruits and are sprayed with multiple pesticides.
A big benefit of taking this is organic grapes are too high in sugar for me to eat daily, so I suspect it's healthier for me to take this supplement.